package org.example.device.protocol;

import org.springframework.stereotype.Component;

import java.util.HashMap;
import java.util.Map;

/**
 * MQTT设备协议实现
 * 用于MQTT协议的智能设备通信
 */
@Component
public class MqttDeviceProtocol implements DeviceProtocol {
    
    private static final String PROTOCOL_TYPE = "MQTT";
    private boolean initialized = false;
    
    @Override
    public ProtocolResult sendCommand(Long deviceId, String command, Map<String, Object> parameters) {
        if (!initialized) {
            return ProtocolResult.failure("MQTT协议未初始化", "PROTOCOL_NOT_INITIALIZED");
        }
        
        try {
            // 构建MQTT消息
            String topic = "devices/" + deviceId + "/command";
            Map<String, Object> message = new HashMap<>();
            message.put("command", command);
            message.put("parameters", parameters);
            message.put("timestamp", System.currentTimeMillis());
            
            // 这里应该发送MQTT消息到设备
            // 实际实现中需要集成MQTT客户端库
            System.out.println("发送MQTT命令到设备 " + deviceId + " 主题: " + topic + " 消息: " + message);
            
            return ProtocolResult.success("MQTT命令发送成功", message);
        } catch (Exception e) {
            return ProtocolResult.failure("MQTT命令发送失败: " + e.getMessage(), "MQTT_SEND_ERROR");
        }
    }
    
    @Override
    public ProtocolResult getDeviceStatus(Long deviceId) {
        if (!initialized) {
            return ProtocolResult.failure("MQTT协议未初始化", "PROTOCOL_NOT_INITIALIZED");
        }
        
        try {
            // 这里应该从MQTT订阅设备状态消息
            // 实际实现中需要订阅设备状态主题
            String topic = "devices/" + deviceId + "/status";
            System.out.println("获取设备 " + deviceId + " 的MQTT状态，主题: " + topic);
            
            // 模拟返回设备状态
            Map<String, Object> status = new HashMap<>();
            status.put("online", true);
            status.put("status", 1);
            status.put("timestamp", System.currentTimeMillis());
            
            return ProtocolResult.success("设备状态获取成功", status);
        } catch (Exception e) {
            return ProtocolResult.failure("获取设备状态失败: " + e.getMessage(), "MQTT_STATUS_ERROR");
        }
    }
    
    @Override
    public ProtocolResult checkConnection(Long deviceId) {
        if (!initialized) {
            return ProtocolResult.failure("MQTT协议未初始化", "PROTOCOL_NOT_INITIALIZED");
        }
        
        try {
            // 检查设备是否在线
            String topic = "devices/" + deviceId + "/heartbeat";
            System.out.println("检查设备 " + deviceId + " 的MQTT连接，主题: " + topic);
            
            // 模拟连接检查
            return ProtocolResult.success("设备连接正常");
        } catch (Exception e) {
            return ProtocolResult.failure("设备连接检查失败: " + e.getMessage(), "MQTT_CONNECTION_ERROR");
        }
    }
    
    @Override
    public String getProtocolType() {
        return PROTOCOL_TYPE;
    }
    
    @Override
    public boolean initialize(Map<String, Object> config) {
        try {
            // 初始化MQTT连接
            String brokerUrl = (String) config.get("brokerUrl");
            String clientId = (String) config.get("clientId");
            String username = (String) config.get("username");
            String password = (String) config.get("password");
            
            System.out.println("初始化MQTT连接: " + brokerUrl + ", 客户端ID: " + clientId + ", 用户名: " + username + ", 密码: " + (password != null ? "***" : "null"));
            // 实际实现中需要创建MQTT客户端连接
            
            this.initialized = true;
            return true;
        } catch (Exception e) {
            System.err.println("MQTT初始化失败: " + e.getMessage());
            return false;
        }
    }
    
    @Override
    public void shutdown() {
        try {
            // 关闭MQTT连接
            System.out.println("关闭MQTT连接");
            // 实际实现中需要断开MQTT客户端连接
            this.initialized = false;
        } catch (Exception e) {
            System.err.println("MQTT关闭失败: " + e.getMessage());
        }
    }
}
